论文标题
地面和卫星观测中三维地球和行星电磁诱导效应的时域建模
Time-Domain Modeling of Three-Dimensional Earth's and Planetary Electromagnetic Induction Effect in Ground and Satellite Observations
论文作者
论文摘要
随时间变化的磁层和电离层电流系统在导电室内诱导的电流对电磁（EM）磁场观测具有显着影响。由于行星的三维（3-D）电结构与诱导电流系统的空间复杂性之间的非线性相互作用，因此很难对EM诱导效应进行完全表征。我们提出了一个通用框架，用于在异质导电行星中3-D EM诱导效应的时间域建模。我们的方法不认为磁场是潜在的，可以在行星内进行任意分布电导率，并且可以处理空间复杂的时变电流系统。该方法适用于在固定观测站点和卫星平台上测量的数据，并可以在近实时设置中计算3-D EM感应效应。
Electric currents induced in conductive planetary interiors by time-varying magnetospheric and ionospheric current systems have a significant effect on electromagnetic (EM) field observations. Complete characterization of EM induction effects is difficult owing to non-linear interactions between the three-dimensional (3-D) electrical structure of a planet and spatial complexity of inducing current systems. We present a general framework for time-domain modeling of 3-D EM induction effects in heterogeneous conducting planets. Our approach does not assume that the magnetic field is potential, allows for an arbitrary distribution of electrical conductivity within a planet, and can deal with spatially complex time-varying current systems. The method is applicable to both data measured at stationary observation sites and satellite platforms, and enables the calculation of 3-D EM induction effects in near real-time settings.
